By default, ScriptWorx assigns the first three browsers on the "Preview" menu to:

Internet Explorer (if installed)
Netscape Navigator (if installed)
Opera (if installed)

You can also define three custom browsers, by setting the values for browsers four through six. First, click the "Browse" button and find the program file (.exe type) of the browser you wish to add. Then, in the next text box, you can assign a name to the browser. When you are done, click the "Ok" button to close the Preferences dialog box.